3961701820 has 12 divisors (see below), whose sum is σ = 8319573864. Its totient is φ = 1584680720.

The previous prime is 3961701763. The next prime is 3961701841. The reversal of 3961701820 is 281071693.

3961701820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3961701820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99042526 + ... + 99042565.

It is an arithmetic number, because the mean of its divisors is an integer number (693297822).

Almost surely, 2^3961701820 is an apocalyptic number.

It is an amenable number.

3961701820 is an abundant number, since it is smaller than the sum of its proper divisors (4357872044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3961701820 is a wasteful number, since it uses less digits than its factorization.

3961701820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198085100 (or 198085098 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 3961701820 is about 62942.0512852894. The cubic root of 3961701820 is about 1582.3185822427.

The spelling of 3961701820 in words is "three billion, nine hundred sixty-one million, seven hundred one thousand, eight hundred twenty".